Question

the pairs of opposite angles​

Answer 1

Answer:

Image result for the pairs of opposite angles

Hence (∠A,∠C),(∠B,∠D) are the pair of opposite angles of quadrilateral.

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Note:

Name of Quadrilateral Description

Square 4 congruent sides. 4 right angles (90°). Opposite sides are parallel. All angles are congruent.

Rhombus Opposite angles are equal

Trapezoid Only one pair of opposite sides is parallel.

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Answer 2

Answer:

when two lines intersect they form two pairs of opposite angles,A+C and B+D.